CN102017568B - Content delivery system for a self-playing - Google Patents

Content delivery system for a self-playing Download PDF

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Publication number
CN102017568B
CN102017568B CN200880129139.9A CN200880129139A CN102017568B CN 102017568 B CN102017568 B CN 102017568B CN 200880129139 A CN200880129139 A CN 200880129139A CN 102017568 B CN102017568 B CN 102017568B
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delivery system
content delivery
content
client
moving object
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CN200880129139.9A
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CN102017568A (en
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V·索扎
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爱立信电话股份有限公司
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Priority to PCT/SE2008/050661 priority patent/WO2009136828A1/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network-specific arrangements or communication protocols supporting networked applications
    • H04L67/10Network-specific arrangements or communication protocols supporting networked applications in which an application is distributed across nodes in the network
    • H04L67/104Network-specific arrangements or communication protocols supporting networked applications in which an application is distributed across nodes in the network for peer-to-peer [P2P] networking; Functionalities or architectural details of P2P networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network-specific arrangements or communication protocols supporting networked applications
    • H04L67/10Network-specific arrangements or communication protocols supporting networked applications in which an application is distributed across nodes in the network
    • H04L67/104Network-specific arrangements or communication protocols supporting networked applications in which an application is distributed across nodes in the network for peer-to-peer [P2P] networking; Functionalities or architectural details of P2P networks
    • H04L67/1074Network-specific arrangements or communication protocols supporting networked applications in which an application is distributed across nodes in the network for peer-to-peer [P2P] networking; Functionalities or architectural details of P2P networks for supporting resource transmission mechanisms
    • H04L67/1076Resource dissemination mechanisms or network resource keeping policies for optimal resource availability in the overlay network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network-specific arrangements or communication protocols supporting networked applications
    • H04L67/06Network-specific arrangements or communication protocols supporting networked applications adapted for file transfer, e.g. file transfer protocol [FTP]

Abstract

当前的内容递送环境的动态性要求利用高度复杂的算法。 The current dynamic content delivery environment requires use of highly complex algorithms. 公开一种用于在内容递送网络(100)中将内容递送给客户端(230,240)的内容递送系统(210),还包括一种用于将内容放置在内容递送网络(100)中的方法。 Discloses a method for content delivery network (100) in the content delivery to the client (230, 240) of the content delivery system (210) further comprises a method for placing content in a content delivery network (100) method. 内容递送系统(210)包括至少一个移动对象(212),这至少一个移动对象不仅适于在内容递送系统(210)上执行,而且还适于在其它内容递送系统(220)上执行。 Content delivery system (210) comprising at least one moving object (212), the at least one mobile object is suitable not only for the (210) executed in the content delivery system, but also suitable for delivery systems (220) performed on other content. 每个移动对象(212)包括媒体文件(213),并且适于监视与客户端(230,240)对媒体文件(213)的访问有关的数据。 Each moving object (212) comprising a media file (213), and adapted to access data pertaining to the media file (213) to monitor the client (230, 240). 当满足某些条件时,例如当访问媒体文件(213)的许多客户端(230,240)更靠近另一个内容递送系统(220)时,移动对象(212)可决定将它本身移动或复制到这另一个内容递送系统(220)。 When certain conditions are met, such as when the number of clients (230, 240) to access the media file (213) is closer to the other content delivery system (220), moving object (212) may decide to move or copy itself this other content delivery system (220).

Description

用于递送自主播放的内容的系统 Content delivery system for a self-playing

技术领域 FIELD

[0001 ] 本发明涉及用于内容递送的方法和系统。 [0001] The present invention relates to a method and a system for content delivery.

背景技术 Background technique

[0002] 内容递送网络或内容分发网络(⑶N)是在互联网上彼此联网的用于向客户端递送内容(特别是媒体内容)的计算机(内容服务器)的系统。 [0002] The content delivery network or content distribution network (⑶N) are networked with each other on the Internet for the delivery of content (in particular media content) to the client computer (content server) system. 由于对内容的请求来自不同位置以便有时遵循某些观看模式,所以内容递送网络难以控制和管理。 Since the request for content from a different position in order to follow certain times view mode, the content delivery network is difficult to control and management. 为了优化性能,可选择靠近客户端的内容服务器和媒体内容的位置。 To optimize performance, select a content server close to the client and the location of the media content. 必须考虑许多参数以优化内容递送网络中的媒体递送,例如: We must consider many parameters to optimize content delivery network, media delivery, such as:

[0003]-内容服务器的数量; [0003] - the number of content servers;

[0004]-客户端和内容服务器的位置; [0004] - location of the client and the content server;

[0005]-资产(媒体内容)的位置; [0005] - location of the asset (media content);

[0006]-资产的受欢迎度; [0006] - the popularity of the assets;

[0007]-网络中的可用带宽; [0007] - the available bandwidth of the network;

[0008]-移动内容的成本。 [0008] - cost of the mobile content.

[0009] 如果想要利用中央管理系统来控制全局CDN,则当涉及到用户行为时的参数的数量和不可预测性使这个问题变得非常复杂。 [0009] If you want to use a central management system to control global CDN, then when the number of parameters when it comes to user behavior and unpredictability make this problem has become very complicated.

[0010] 现有的解决方案试图以集中化方法来解决这个问题。 [0010] Existing solutions centralized approach to trying to solve this problem. 在这些不同的解决方案中考虑所有参数试图将内容放置在网络中的最佳位置。 Trying to take into account all the parameters content at the optimum position of the network in these different solutions. 但是,这种环境的动态性使得算法高度复杂,并且做出和实现全局决定要花费很长的时间。 However, the dynamics of this environment makes it highly complex algorithms, and to make and implement global decisions take a long time.

[0011] 与本发明有关的另一技术领域是移动对象(又称为移动代理)。 [0011] Another related art to which the present invention is a moving object (also referred to as Mobile Agent). 移动对象是有时可从网络中的一个主机迀移到另一个主机并迀移到它们自己选择的地点的程序(软件)和相关联的数据。 It is sometimes moving objects from one host to another host in the network and Gan Gan moved to place their own choice of programs (software) and associated data. 在新的主机中,它们可接着继续运行,从而可能与本地执行环境交互。 In the new host, they can then continue to run, which could interact with the local execution environment. 例如,在1999 年8 月的“ACM Operating System Review”(pp 7-13)中由Kotz 等人发表的论文“Mobile Agents and the Future of the Internet” 中论述了移动对象。 For example, in August 1999 of "ACM Operating System Review" (pp 7-13) published by Kotz et al paper "Mobile Agents and the Future of the Internet" discussed the moving object. 在美国专利7254608中公开了利用移动代理的示例。 In U.S. Patent No. 7,254,608 discloses an example of mobile agent. 该专利公开了利用移动代理来管理对等网络中的内容分发的系统和方法。 This patent discloses a system and method for managing content on the mobile agent and the like in a distribution network. 在该专利中,移动代理可在行程上访问对等节点以搜索和收集有关存储在受访对等机上的分发器内容的信息。 In this patent, a mobile agent peer node information accessible to search and collect information stored on the visited peer contents distribution in a stroke.

发明内容 SUMMARY

[0012] 本发明涉及如何避免如上所述的管理内容递送网络的缺点的问题。 [0012] The present invention relates to how to avoid the disadvantages of managing content delivery network as described above problem.

[0013] 该问题在本发明中通过将内容本身(例如媒体文件)放置在移动对象(代理)中来解决。 [0013] This problem will content itself (e.g., media file) is placed in a moving object (agents) to be solved by the present invention. 本发明包括一种用于将内容递送给客户端的内容递送系统。 The present invention comprises a method for delivering content to a content client delivery system. 该内容递送系统包括至少一个移动对象,这至少一个移动对象不仅适于在内容递送系统上执行,而且还适于在其它内容递送系统上执行。 The content delivery system comprises at least one moving object, the at least one mobile object is not suitable for execution on the content delivery system, but also suitable for execution on other content delivery system. 这些移动对象的特征在于,它们包括: Characterized in that the moving object, which comprises:

[0014]-可供客户端访问的媒体文件; [0014] - available to clients to access media files;

[0015]-策略数据库;以及 [0015] - the policy database; and

[0016]-执行逻辑,其适于监视与客户端对媒体文件的访问有关的数据,询问策略数据库,并且当满足存储在策略数据库中的某些条件时,向另一个内容递送系统移动或复制该移动对象。 [0016] - execution logic, which is adapted to monitor data associated with the client access to media files, database query strategy, and when certain conditions stored in the policy database is satisfied, the delivery system to move or copy the content to another the moving object.

[0017] 本发明还包括一种用于将内容放置在内容递送网络中的方法。 [0017] The present invention further comprises a method for placing content in a content delivery network method.

[0018] 在该方法中,移动对象(如上所述,包括策略数据库和可供客户端访问的媒体文件)在一个内容递送系统中执行。 [0018] In this method, the moving object (as described above, and comprises a policy database for the client to access a media file) is performed in a content delivery system. 移动对象监视与客户端对媒体文件的访问有关的数据,并且当满足存储在策略数据库中的某些条件时,移动对象将它本身移动或复制到另一个内容递送系统。 Moving object monitoring with the client to access the data related to the media file, and when certain conditions are stored in the policy database to meet, moving objects moved or copied to another content delivery system itself.

[0019] 作为一个选择,移动对象从原始的内容递送系统移动到另一个系统,而不会在原始系统中留下任何痕迹。 [0019] As an option, the mobile object delivery system to another system from the original content without leaving any trace in the original system. 移动对象可适于在另一个内容递送系统中开始执行时保持它的执行状态,或者它可适于在执行之前重设执行状态。 Moving object may be adapted to hold its execution state begins execution of another content delivery system, or it may be adapted to perform before executing reset state.

[0020]另一个选择是将原始内容递送系统中的移动对象复制到另一个系统,并且原始系统中的移动对象继续与该另一个系统中的移动对象并行执行。 [0020] Another option is to move the object to copy the original content delivery system to another system, and the moving object in the original system continues performed in parallel with the moving object in the other system.

[0021] 本发明使得内容(例如媒体文件)变成自主性的。 [0021] The present invention is such that the content (e.g. media files) into autonomy. 自主在这里的意思是,移动对象足够智能以监视与客户端对媒体文件的访问有关的数据(例如,已经下载媒体文件的次数、本地链路利用率测量、链路成本等),并做出合适的决定。 Self here means that the moving object is smart enough to monitor the data (for example, the number of media file has been downloaded, the local link utilization measurements, link costs) for the client media file access-related, and make the right decision. 代替利用中央服务器(或一对服务器)来采集全局信息并做出全局决定,本发明包括基于本地信息做出本地决定的移动对象。 Instead of using a central server (or servers) to gather information and make global decisions overall, the present invention includes a moving object based on local information to make a local decision. 这将高度简化通过内容递送网络放置和控制内容的方法。 This will highly simplified method of placement and the control content delivery network by the content.

[0022] 因此,本发明的目的是克服上文提到的缺点。 [0022] Accordingly, an object of the present invention is to overcome the drawbacks mentioned above.

[0023] 本发明具有几个优点: [0023] The present invention has several advantages:

[0024] 鲁棒性;该系统之所以更具鲁棒性是因为,它以强大的故障隔离特性为特征。 [0024] robustness; the reason why the system is more robust because it is a powerful fault isolation characteristic features. 移动对象是依赖于本地环境而非依赖于集中化系统的独立软件片段。 An independent piece of software is dependent on moving objects rather than relying on the local environment centralized systems. 向这种分布式系统启动拒绝服务攻击变得更难。 This distributed system starts to denial of service attacks more difficult.

[0025] 没有中心故障点;控制和管理功能性的均等分配带来良好的负荷分配,而不会带来中心故障点。 [0025] there is no central point of failure; bring good load distribution equal distribution management functionality and control, without incurring the central point of failure.

[0026] 简单;通过允许基于本地认知做出本地决定而消除了传统的全局优化算法的复杂性。 [0026] simple; by allowing to make local decisions based on local knowledge and global optimization eliminates the traditional complexity of the algorithm.

[0027] 更低的维护/管理成本;简单性导致整个系统的维护成本更低。 [0027] Lower maintenance / management costs; simplicity results in lower maintenance costs of the entire system.

[0028] 现在将参考附图利用优选实施例更详细地描述本发明。 [0028] reference will now be using the preferred embodiment of the present invention is described in more detail in FIG.

附图说明 BRIEF DESCRIPTION

[0029] 图1是示出内容递送网络的框图。 [0029] FIG. 1 is a block diagram illustrating the content delivery network.

[0030] 图2是示出根据本发明的内容递送系统和移动对象的第一实施例的框图。 [0030] FIG. 2 is a block diagram of a first embodiment of a delivery system and a mobile object according to the present invention.

[0031] 图3a和3b是示出根据本发明用于在内容递送网络中分配内容的方法的流程图。 [0031] Figures 3a and 3b are flowcharts illustrating the present invention a method for distributing content in a content delivery network according to.

[0032] 图4a是示出根据本发明的内容递送系统的第二实施例的框图。 [0032] FIG 4a is a block diagram of the second embodiment of the delivery system according to the present invention.

[0033] 图4b是示出内容递送系统的实现的一个实施例的框图。 [0033] FIG 4b shows a block diagram of one embodiment of the contents of the delivery system to achieve.

具体实施方式 Detailed ways

[0034] 图1示出内容递送网络⑶N 100的示例。 [0034] FIG. 1 shows an example of a content delivery network of ⑶N 100. 在这个示例中,⑶N 100包括四个内容服务器111、112、113和114。 In this example, ⑶N 100 includes a content server 111, and four 114. 这些内容服务器111-114通过包括多个路由器或交换机(switch) 121、122和123的网络互连。 The content servers 111-114 interconnected by a network comprising a plurality of routers or switches (switch) 121,122 and 123. 在内容服务器111中,存储了媒体文件1111。 In the content server 111, the storage media file 1111. 在这个示例中,媒体文件1111可供五个不同的客户端131、132、133、134和135访问。 In this example, the media file 1111 for five different clients 131, 132 and 135 access. 由于大多数客户端设置在较服务器111而言更靠近服务器112的位置,所以值得考虑的是将内容(即,来自服务器111的媒体文件1111)移动到服务器112。 Since most client server 112 is provided closer to the server 111 at the longer terms, it is worth considering the content (i.e., a media file from the server 111 to 1111) to the server 112. “更靠近”在这里可以是基于网络的距离,例如服务器111、112与客户端131-135之间的节点跳数(number of node hops)。 "Closer" as used herein may be based on the distance of a network, such as the server 111, 112 the number of hops between nodes 131-135 (number of node hops) and the client. 通过将内容移动到更靠近客户端133、134和135的位置,传输资源得以保存在网络100中,延迟将更少,并且响应时间将更快速。 By moving the content to a position closer to the clients 133, 134 and 135, transmission resources can be saved in the network 100, the delay will be less, and the response time will be faster.

[0035] 在已知的现有技术中,通过中央操作和管理中心OMC 190管理内容服务器111、112、113和114。 [0035] In the known prior art, by a central operation and management center OMC 190 and 114 111, the content managing server. 如上所述,这个解决方案具有多个缺点。 As described above, this solution has several drawbacks.

[0036] 图2描述本发明的一个实施例。 [0036] FIG 2 depicts an embodiment of the present invention. 这里,内容递送系统是根据本发明的内容服务器1210和移动对象212。 Here, the content delivery system according to the present invention, a server 1210 and the mobile object 212. 内容服务器1210包括执行环境211和至少一个移动对象212。 Content server 1210 comprises the object execution environment 211 and at least one mobile 212. 移动对象212包括媒体文件213。 Moving object 212 includes a media file 213. 这个媒体文件213可以是数据文件,如电影、流式视频(streamingvideo)、游戏、音频文件、文档(其可在动作231中由客户端230、240访问以供在线观看或下载)等。 This media file 213 can be data files, such as movies, streaming video (streamingvideo), games, audio files, documents (which can be accessed in action 231 230, 240 by the client for online viewing or download) and so on.

[0037] 移动对象212还包括执行逻辑214。 [0037] The moving object 212 further comprises execution logic 214. 执行逻辑包括用于执行移动对象212的程序代码215和数据区216。 Execution logic for executing the moving object 212 includes program code 215 and data area 216. 执行逻辑214还在动作231中处理来自客户端230、240的想要访问媒体文件213的请求。 Operation logic 214 also performs the processing from a client 231 wants to access the media file request 230, 240 213. 优选地,程序代码215的编程语言可以是Java,它是用于实现移动对象的最常用的编程语言,因为它与平台独立。 Preferably, program code 215 may be a programming language Java, which is for realizing the moving objects most commonly used programming language, and as it is independent internet. 数据区216还包括与客户端230、240对媒体文件213的访问有关的数据,例如: A data area 216 also includes data related to the client 230, 240, 213 to access media files, such as:

[0038] _(客户端230、240与移动对象212之间的)有效连接的数量; [0038] _ (230, 240 and the mobile client between the object 212) an effective number of connections;

[0039]-对移动对象212的总的访问次数; [0039] - the total number of access to the moving object 212;

[0040]-每个时间单位已经访问媒体文件213的次数(例如,每分钟的访问次数); [0040] - Each time unit 213 has access to the media file number (e.g., number of accesses per minute);

[0041]-访问媒体文件213的客户端230、240的位置(例如,利用客户端230、240的源IP地址); [0041] - the position of the access media files 230, 240, client 213 (e.g., using the IP address of the source client 230, 240);

[0042]-其它服务器的位置。 [0042] - the position of the other servers.

[0043] 除了监视移动对象212的数据区216中的数据之外,执行逻辑214还适于在动作241中监视与执行环境211有关的数据,例如: [0043] In addition to the data area 216 in the moving object monitoring data 212, execution logic 214 is also adapted to monitor data associated with the operation of the execution environment 211 241, for example:

[0044]-可用带宽和/或处理器负荷; [0044] - the available bandwidth and / or processor loads;

[0045]-内容服务器210与客户端230、240之间的可用通信链路; [0045] - the content server 210 may be a communication link between the client 230, 240;

[0046]-通信链路使用率(usage)和/或链路成本。 [0046] - the communication link utilization (Usage) and / or link costs.

[0047] 移动对象212还包括策略数据库217。 [0047] The moving object 212 further includes a policy database 217. 这个数据库217适于包括可触发移动对象212的动作的任何种类的特定应用策略,例如: The database 217 is adapted to any kind of moving object 212 includes a trigger operation of a particular application policy, for example:

[0048]-每个时间单位对媒体文件213的最大和最小可接受访问次数; [0048] - Each time unit of the media file 213, the maximum and minimum acceptable number of accesses;

[0049]-移动对象212将消耗的最大和最小可接受带宽; [0049] - the maximum and minimum acceptable bandwidth of the mobile object 212 to be consumed;

[0050]-传送媒体文件(213)的最大网络成本。 [0050] - the largest network cost transfer media files (213).

[0051] 通过利用与媒体文件213的访问和执行环境211有关的数据216并询问策略数据库217,执行逻辑214可例如确定访问媒体文件213的大多数客户端240设置在靠近另一个服务器、即内容服务器2220的位置。 [0051] The data relating to access by using the media file 213 and the execution environment 211 216 and asks the policy database 217, execution logic 214 may access media files, for example, to determine the most client 213 is disposed near another server 240, i.e., the content location server 2220.

[0052] 在满足存储在策略数据库217中的某些条件的情况下,执行逻辑214可在动作250中触发将移动对象212从内容服务器1210移动到具有它自己的执行环境221的内容服务器2220的过程。 [0052] In the case of satisfying certain conditions stored in the policy database 217, execution logic 214 may trigger to move the moving object 212 from the content server 1210 to have its own execution environment 250 in operation 221 of the content server 2220 process.

[0053] 在这个过程中,移动对象212停止为来自客户端230、240的请求进行服务。 [0053] In this process, the moving object 212 is a stop 230, 240 is a request from the client server. 暂停与客户端230、240的有效连接。 230, 240 suspended effective connection with the client. 移动对象212通过利用合适的信令协议(例如,改进的TCP)来通知客户端230、240关于此暂停。 Moving object 212 to inform the client by using suitable signaling protocols (e.g., modified TCP) 230, 240 on this end of the suspension. 此信令通常要求来自执行环境211和基础操作系统的一定支持。 This signaling typically requires some support from the execution environment 211 and the underlying operating system. 另一方面,执行环境211和221不知道移动对象212来自哪里或它接下来要到哪里去。 On the other hand, the execution environment 211 and 221 do not know where the mobile object 212 or from the next to it go.

[0054] 在移动过程中,移动对象212从原始的内容服务器1210移动到内容服务器2220,而不会在内容服务器1210中留下任何痕迹。 [0054] In the process of moving, the moving object 212 moves from the original content server 1210 to the content server 2220, without leaving any marks on the content server 1210.

[0055] 在满足存储在策略数据库217中的其它条件的情况下,执行逻辑214可触发将移动对象212从内容服务器1210复制到内容服务器2220中的新移动对象222的过程。 [0055] In the case where other conditions are satisfied is stored in the policy database 217, execution logic 214 may trigger the movement of an object copy 212 from the content server 1210 to process the new moving object 222 content servers 2220. 在此情况下,内容服务器1210中的移动对象212继续与副本222并行执行。 In this case, the moving object 212 in the content server 1210 to continue in parallel with the replica 222.

[0056] 移动对象212的副本222可适于在内容服务器2220中开始执行时保持它的执行状态,或者它可适于在执行之前重设执行状态。 212 copies of the [0056] moving object to maintain its state 222 may be adapted to perform begins execution in a content server 2220, or it may be adapted to perform before executing reset state.

[0057] 为了使之前未连接的客户端找到移动对象212的新位置,利用例如DNS (域名服务)重定向来启动名称解析过程。 [0057] In order that the client is not connected prior to find a new location of the moving object 212, for example using a DNS (Domain Name Service) name resolution process to initiate redirection.

[0058] 还可能发生的情形是,在特定时间段中只有很少(或根本没有)客户端访问媒体文件213。 [0058] may also happen that situation, only a few (or no) client access media files 213 in a specific time period. 这可以指示媒体文件213已经变得不那么受欢迎,或者指示客户端240设置在靠近已经拥有媒体文件213的副本的另一个内容服务器2220的位置。 This indicates that the media file 213 has become less popular, or instruct the client in a position to set another content server 240 copies already has close to 213 of the media file 2220. 在这种情况下,执行逻辑214可做出简单地令内容服务器1210中的移动对象212 “死亡”并删除它本身的决定。 In this case, the execution logic 214 may be made simply make moving target content server 212 in 1210, "death" and delete its own decision.

[0059] 图3a和3b中的流程图示出根据本发明用于在内容递送网络100中分配内容的方法的实施例。 [0059] Figures 3a and 3b are a flowchart showing a method embodiment of the content delivery network 100 allocated in the context of the present invention is provided. 在步骤301,移动对象212在原始服务器210中执行。 , The original moving object 212 executed in the server 210 in step 301. 在执行期间,它在步骤302监视与客户端对媒体文件213的访问有关的数据。 During execution, it accesses the data related to the media file 213 in step 302 monitors the client. 此数据可由移动对象本身212收集并存储在数据区216中。 This data may be collected and the moving object 212 itself stored in the data area 216. 该数据也可设置在执行环境211中并在动作241中供移动对象212访问。 The data may also be provided in the execution environment 211 and 212 for moving objects 241 access operation.

[0060] 在步骤303,检查是否可删除媒体文件213。 [0060] In step 303, to check whether to delete the media file 213. 如果特定时间段已过去而没有任何客户端230、240访问媒体文件213或者已经很少访问媒体文件213,则在步骤304,移动对象212可做出停止执行并删除它本身的决定。 If a certain period of time has elapsed without any client access media files 230, 240 or 213 has very little access to the media file 213, at step 304, the moving object 212 can make a decision to stop the execution and remove it themselves. 对此的条件存储在策略数据库217中。 In the policy database 217 stored in the condition of this. 反之,如果媒体文件213很受欢迎,但是主要由设置在更靠近另一个内容服务器220的位置的客户端240访问,则移动对象212在步骤305做出将移动对象212移动到该另一个服务器220的决定。 Conversely, if the media file 213 is very popular, but mainly by the client provided at a position closer to the other content server 220 of access terminal 240, the mobile object 212 is made in step 305 the mobile object 212 is moved to the other server 220 decision. 但是,在步骤307中将移动对象发送给该另一个内容服务器220之前,移动对象212在步骤306中停止对媒体文件213的访问并暂停客户端230、240与移动对象212之间的有效连接。 However, before transmission to the content server 220 to another mobile object 212 stops access to media files 213 in step 306 and suspends the operative connection between the client 230, 240 and the mobile object 212 at step 307 in the moving object.

[0061] 如果步骤305中的决定是不移动媒体文件213,则流程图在图3b中继续(圈起来的数字“2”)。 [0061] If the decision in step 305 the media file 213 is not moving, the flowchart continues in Figure 3b (the circled number "2").

[0062] 如果媒体文件213在客户端230 (靠近内容服务器1210)和客户端240 (靠近内容服务器2220)所在的区域都受欢迎,则移动对象212可在步骤308 (现在转到图3b)做出在步骤309中复制它本身而不是移动的决定。 [0062] If the media file 213 at the client 230 (close to Content Server 1210) and a client area 240 (near the content servers 2220) are popular where the mobile object 212 at step 308 may be (Turning now to FIG. 3b) do in step 309 a copy and not the decision itself moves. 在将移动对象212的副本222发送给内容服务器2220之前,在步骤310检查是保持还是重设存储在副本222的数据区216中的当前的执行状态。 Before sending the copy to the content server 212 will move the object 2,222,220, it is checked at step 310 to maintain the current execution state or reset is stored in the data area 222 of 216 copies. 如果要保持状态,则在步骤312将移动对象212的副本222( “复制品”)发送给内容服务器2220。 To maintain the state, content server 2220 in step 312 sent to the moving object 222 212 copies ( "replicas"). 如果要重设状态,则在步骤311重设状态,并在步骤312发送副本222 (新“实例”)。 To reset state, the reset state at step 311, and step 222 sends a copy (new "instance") 312. 在步骤312中发送副本222之后,过程如图3a所示整个重新开始(圈起来的数字“I”)。 After transmitting the copy 222 in step 312, the entire process shown in Figure 3a is restarted (circled number "I"). 如果移动对象212在步骤308决定不复制它本身,则情况也是如此。 If the moving object 212 determined at step 308 itself is not copied, it is true.

[0063] 在上述实施例中,本发明适用于从一个内容服务器210移动和/或复制到另一个内容服务器220的移动对象212。 [0063] In the above embodiment, the present invention is applicable to moving from a server 210 and / or copying the contents to a contents server 220 to another moving object 212. 本发明概念还允许移动对象212在具有允许执行移动对象212的执行环境的其它内容递送系统之间迀移。 The inventive concept also allows the mobile object 212 having the other execution environment 212 to allow the contents of the shift between the mobile object Gan delivery system.

[0064] 这样的一个示例是对等P2P网络。 [0064] This example is like a P2P network. 图4a示出包括多个终端401、402、403、404的P2P网络400。 4a shows a P2P network comprising a plurality of terminals 401 402 403 404 400 在这个示例中,所有终端401-404完全网状连结地彼此相连。 In this example, all of the terminals 401-404 to fully meshed link connected to each other. 内容递送系统(210)在这里对应于任何终端401-404。 Content delivery system (210) corresponding to where any terminal 401-404. 假设移动对象405设置在终端401中,则移动对象405可在动作407中决定将它本身移动到另一个终端404。 Suppose the moving object 405 is provided in the terminal 401, the mobile may decide to move the object 405 itself to another terminal 404 in operation 407.

[0065] 如果需要,本发明概念还允许移动对象212在相同的内容递送系统210中移动和/或复制它本身。 [0065] If desired, the concepts of the present invention allows the mobile object 212 in the same content delivery system 210 to move and / or copy itself.

[0066] 本发明的又另一个方面是,可将内容递送系统220视为是在将移动对象212移动或复制到执行环境221中时动态创建的内容递送端点(内容源)。 Yet another aspect of the [0066] present invention is that the content delivery system 220 may be considered to be moving, or copying content to the execution environment 221 in the dynamically moving object 212 creates a delivery endpoint (content source). 作为一个示例,当将根据本发明的移动对象212复制或移动到内容服务器220的执行环境221中时,原本不是内容服务器但一般具有适于移动对象的执行环境221的服务器可变成内容服务器2220。 As one example, when copying or moving objects move in accordance with the present invention, the content server 212 to the execution environment 220 221, but generally not originally have a content server adapted to move the object execution environment server 221 may become the content server 2220 .

[0067] 此外,通过利用本发明概念,技术人员可创建更适当的适合管理特定内容递送网络的不同策略和对应的行为。 [0067] Further, by using the concept of the present invention, the skilled artisan can create more appropriate for specific content delivery management policies and the corresponding behavior of different networks.

[0068] 图4b示出内容递送系统210的实现的示例。 [0068] FIG 4b illustrates an exemplary content delivery system 210 is implemented. 系统210包括设计成执行存储区420中的软件的处理器410。 The system 210 includes a storage area designed to execute software 420 processor 410. 这个存储区420包括执行环境430和至少一个移动对象MO 421、422、423。 The storage area 420 comprises the object execution environment 430 and at least one mobile MO 421,422,423. 每个移动对象421、422、423适于与执行环境430通信。 Each moving object 421,422,423 and 430 adapted to execute the communication environment.

Claims (11)

1.一种用于将内容递送给至少一个客户端(230)的内容递送系统(210),所述系统(210)包括处理器(410)和存储区(420),且其特征在于至少一个移动对象(212),所述至少一个移动对象(212)适于存储在所述存储区(420)中并适于在所述内容递送系统(210)和在至少一个第二内容递送系统(220)中执行,并且其中所述移动对象(212)包括: -可供所述客户端(230)访问的媒体文件(213); -策略数据库(217);以及-执行逻辑(214),其包括程序代码(215)和数据区(216),其中所述数据区(216)包括与所述客户端(230)对所述媒体文件(213)的访问有关的客户端访问数据,并且其中所述执行逻辑(214)适于监视所述客户端访问数据,以及询问所述策略数据库(217),并且当所述客户端访问数据满足存储在所述策略数据库(217)中的某些条件时,将所述移动对象(212)移动或复制到所述第二内容递送系统(220)或删除所述移 1. A method for delivering content to at least one client (230) of the content delivery system (210), said system (210) comprising a processor (410) and a storage area (420), and wherein at least one of moving object (212), said at least one moving object (212) adapted to store in said storage area (420) and adapted in the content delivery system (210) and at least a second content delivery system (220 ) is performed, and wherein said moving object (212) comprising: - is available to the client (230) to access the media file (213); - a policy database (217); and - execution logic (214), which comprises a program code (215) and a data area (216), wherein said data area (216) comprises a client access data to said client (230) to access the media file (213) related to, and wherein said when the execution logic (214) adapted to monitor the client to access the data, and query the policy database (217), and when the client to access data stored in certain conditions the policy database (217) is met, the moving object (212) to move or copy the second content delivery system (220) or deleting the shift 对象(212)。 Object (212).
2.如权利要求1所述的内容递送系统(210),还包括适于移动对象(212)的执行环境(211),并且其中所述移动对象(212)中的所述执行逻辑(214)还适于监视(241)与所述执行环境(211)有关的数据。 As claimed in claim 1 content delivery system (210), further comprising a target adapted to be moved (212) in an execution environment (211), and wherein said execution logic of the moving object (212) (214) also suitable for data relating to the execution environment (211) to monitor (241).
3.如权利要求1或2所述的内容递送系统(210),其中所述数据区(216)包括以下客户端访问数据中的任何数据: -对所述移动对象(212)的访问次数; -所述客户端(230)与所述移动对象(212)之间的有效连接(231)的数量; -每个时间单位已经访问所述媒体文件(213)的次数; -访问所述媒体文件(213)的所述客户端(230,240)的位置; -其它内容递送系统(220)的位置。 1 or the content of the claim delivery system (210), wherein said data area (216) includes any data the client access data: - number of times the moving object (212) access; the number of clients (230) operative connection between the (212) and the moving object (231) -; - per time unit has (213) of visits to the media file; - accessing the media file (213) the client (230, 240) position; - position of the delivery system (220) of the other content.
4.如权利要求2所述的内容递送系统(210),其中与所述执行环境(211)有关的所述数据包括以下数据中的任何数据: -可用带宽和/或处理器负荷; -所述内容服务器(210)与所述客户端(230,240)之间的可用通信链路; -通信链路使用率和/或链路成本。 4. The content of the delivery system of claim 2 (210), wherein the data relating to the execution environment (211) includes any data of the following data: - the available bandwidth and / or processor loads; - the available communication links between said content server (210) and the client (230, 240); - the communication link usage and / or link cost.
5.如权利要求1、2、4中任一项所述的内容递送系统(210),其中所述策略数据库(217)包括以下数据中的任何数据: -每个时间单位对所述媒体文件(213)的最大和最小可接受访问次数; -所述移动对象(212)将消耗的最大和最小可接受带宽; -传送媒体文件(213)的最大网络成本。 5. 2,4 any one of the content delivery system (210) as claimed in claim, wherein said policy database (217) includes any data of the following data: - per unit of time of the media file (213) the maximum and minimum acceptable number of accesses; - the maximum and minimum acceptable bandwidth of the moving object (212) to be consumed; - the maximum network cost transmission media file (213).
6.如权利要求1、2、4中任一项所述的内容递送系统(210),其中所述系统(210)是内容服务器。 2,4 according to any one of the content delivery system (210) as claimed in claim 6, wherein said system (210) is a content server.
7.—种用于将内容放置在内容递送网络(100)中的方法,其特征在于以下步骤: -在第一内容递送系统(210)中执行(301)移动对象(212),所述移动对象(212)包括执行逻辑(214)、策略数据库(217)和可供至少一个客户端(230)访问的媒体文件(213),并且其中所述执行逻辑(214)包括与所述客户端(230)对所述媒体文件(213)的访问有关的客户端访问数据; -监视(302)所述客户端访问数据;以及-当所述客户端访问数据满足存储在所述策略数据库(217)中的某些条件时,将所述移动对象(212)的副本(222)移动(307)或发送(312)到第二内容递送系统(220),或删除(304)所述移动对象(212)。 7.- method for placing content in a content delivery network (100), characterized by the following steps: - performing (301) the mobile object (212) in a first content delivery system (210), the mobile object (212) includes logic (214), a policy database (217) and for at least one client (230) to access the media file (213), and wherein said execution logic (214) comprises a client ( 230) client access data to access the media file (213) associated; - monitoring (302) the client to access the data; and - when the policy database of the client to access data stored satisfy (217) when a copy of certain conditions, the moving object (212) (222) moving (307) or transmission (312) to the second content delivery system (220) or remove (304) the moving object (212 ).
8.如权利要求7所述的方法,还包括以下步骤:监视(302)与适于所述内容递送系统(210)中的移动对象(212)的执行环境(211)有关的数据。 8. The method according to claim 7, further comprising the step of: (211) data related to monitoring (302) and adapted to move the object to the content delivery system (212) (210) in the execution environment.
9.如权利要求7所述的方法,还包括以下步骤:在将所述移动对象(212)的副本(222)移动(307)或发送(312)到所述第二内容递送系统(220)的所述步骤之前,暂停(306)有效连接,并停止(306)执行所述移动对象(212)。 9. The method according to claim 7, further comprising the steps of: a copy of the moving object (212) (222) moving (307) or transmission (312) to the second content delivery system (220) prior to said step, pause (306) is operably linked, and stops (306) performs the moving object (212).
10.如权利要求7所述的方法,包括以下步骤:在将所述移动对象(212)的所述副本(222)发送(312)到所述第二内容递送系统(220)的所述步骤之前,重设(311)所述副本(222)中的执行状态。 Said step of said copy (222) transmits (312) the mobile object (212) to the second content delivery system (220) is: 10. The method according to claim 7, comprising the steps of before performing the reset state (311) said copy (222) of.
11.如权利要求10所述的方法,还包括以下步骤:继续(301)在所述第一内容递送系统(210)中执行所述移动对象(212)。 11. The method of claim 10, further comprising the step of: continuing (301) the first content delivery system (210) of the moving object is performed (212).
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